LXR linux/drivers/pwm/pwm-tipwmss.c

   1/*
   2 * TI PWM Subsystem driver
   3 *
   4 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 * GNU General Public License for more details.
  15 *
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/platform_device.h>
  20#include <linux/io.h>
  21#include <linux/err.h>
  22#include <linux/pm_runtime.h>
  23#include <linux/of_device.h>
  24
  25static const struct of_device_id pwmss_of_match[] = {
  26        { .compatible   = "ti,am33xx-pwmss" },
  27        {},
  28};
  29MODULE_DEVICE_TABLE(of, pwmss_of_match);
  30
  31static int pwmss_probe(struct platform_device *pdev)
  32{
  33        int ret;
  34        struct device_node *node = pdev->dev.of_node;
  35
  36        pm_runtime_enable(&pdev->dev);
  37
  38        /* Populate all the child nodes here... */
  39        ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
  40        if (ret)
  41                dev_err(&pdev->dev, "no child node found\n");
  42
  43        return ret;
  44}
  45
  46static int pwmss_remove(struct platform_device *pdev)
  47{
  48        pm_runtime_disable(&pdev->dev);
  49        return 0;
  50}
  51
  52static struct platform_driver pwmss_driver = {
  53        .driver = {
  54                .name   = "pwmss",
  55                .of_match_table = pwmss_of_match,
  56        },
  57        .probe  = pwmss_probe,
  58        .remove = pwmss_remove,
  59};
  60
  61module_platform_driver(pwmss_driver);
  62
  63MODULE_DESCRIPTION("PWM Subsystem driver");
  64MODULE_AUTHOR("Texas Instruments");
  65MODULE_LICENSE("GPL");
  66